Researchers at the University of Amsterdam and the HFML-FELIX institute in Nijmegen have published their work which utilizes the FELIX free-electron laser of the HFML-FELIX institute to conduct infrared spectroscopy analysis to reveal the molecular structure of a thiourea-based organocatalyst. Along with the detailed insights of the structure, the team also observed the precise structural changes the catalyst goes through when binding with reactants.
While catalysts are crucial components in modern chemistry, traditional metal-based catalysts are often expensive, toxic, and not environmentally friendly. In recent years, in response to these drawbacks, organocatalysts have garnered increased attention as a cheap, safe, and environmentally friendly alternative.
To guide the rational design of new and more efficient organocatalysts, researchers must obtain precise and reliable information regarding the structure and inter- and intramolecular interactions. To do so, the team developed their novel technique of merging a molecular beam of catalyst and reactant with the infrared laser light which opens the spectral range allowing the team to capture detailed IR fingerprints and quantum chemical calculations to resolve the characterization of the catalyst and catalyst-reactant complex in superb detail.
The work, which was published in The Journal of Physical Chemistry Letters, paves the way for new, rational designs of highly efficient organocatalysts. The methodology employed is also widely applicable and could lead to revolutionary new studies on a wide range of other catalysts whose reactive intermediates have remained elusive.